Park Avenue Tower is a building on Park Avenue, between 55th Street and 56th Street, in Midtown Manhattan, New York City. The office building developed by Park Tower Realty opened in 1986 and has a height of 561 feet. Park Avenue Tower has 36 floors, which can be reached with seventeen elevators. Designed by Murphy/Jahn Architects in postmodern style, Park Avenue Tower is made of stone, steel and glass. The floor plan of the building is a square with flattened corners and the tower narrows as it increases in height. There is a pyramid-shaped structure on the roof of the building that is not visible from the street.